I'm getting ready to upgrade to a MTW hybrid, 175/75s and a regulated return. While I'm in there I want to upgrade to SS exhaust bellows, has anyone cut their Y pipe apart and welded in bellows themselves? I am wondering if you need a jig to do this or can you weld in the bellows just using measurements?

The two sets that I did, I did with markings/measurements, but I wouldn't recommend doing this without a jig. I think without a jig or mock-up motor, you'll just end up wasting your time and the V-band flange won't line up.

I done mine cab on. Cut out the old ones, then bolted the pipes and flanges down then made small cuts for a butt joint connection for the bellows. Then tacked them in, removed y pipe assembly and tig welded it together. Took about 8 hours with all the trimming, but worked out great.

The two sets that I did, I did with markings/measurements, but I wouldn't recommend doing this without a jig. I think without a jig or mock-up motor, you'll just end up wasting your time and the V-band flange won't line up.

How did they turn out, any problems with the flange not lining up with the turbo?

I done mine cab on. Cut out the old ones, then bolted the pipes and flanges down then made small cuts for a butt joint connection for the bellows. Then tacked them in, removed y pipe assembly and tig welded it together. Took about 8 hours with all the trimming, but worked out great.

I may try a combination of both methods, pull the Y pipe measure everything up, cut the old bellows out, slip the new ones on and bolt back up with the new bellows in place then tack them pull the Y pipe again and finish welding.

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